Good day everyone, desperate for some VW troublshooting knowledge. Car had been daily driven up until one morning it was slow to crank. Added a booster pack and turns over quickly but won't fire. I have noticed I don't get a glow plug light or check engine light when key power on. I have checked all the fuses under hood and behind drivers door. I have good 12v on edc fuse. Replaced 109 relay with no change. Pinned out the edc connecter and I have no power on hot pins, unless I remove 109 relay and jump it, then I have 12v but still no fire. Checked and cleaned the Edc ground below windshield with no change. Only code I am getting with scanner is P0864 TCM Communication Circuit Range / performance. Any tip or help would be greatly appreciated.